nova

75 years ago on December 2, scientists at the University of Chicago inaugurated the nuclear era by engineering the first self-sustaining nuclear chain reaction. Learn about the origins of nuclear power and the upsides and downsides of its future.

"The Great Train Story" at the Museum of Science and Industry is a beloved stalwart of the museum. Meet the man who maintains it in advance of a NOVA episode on "Why Trains Crash," airing February 22 at 9:00 pm.

Personal butlers, in-suite spas, prints by Chagall and Picasso, hand-blown Murano glass: this is a cruise at its most luxurious.